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New Product Highlight: Sig Sauer P320-M18 CA

Sig Sauer rolls out the new Sig P320-M18 CA - a 9mm striker-fired handgun officially on the California Handgun Roster.

    California residents will now have a new pistol available to purchase after Sig Sauer announced a revamped P320-M18 that is California-compliant.

    P320 Billboard
    The P320 is headed to California. (Photo: Sig Sauer)

    The announcement came last week as a result of a preliminary injunction granted by U.S. District Judge Cormac J. Carney earlier this year. The injunction prevented the state from requiring new pistols to possess a microstamping feature currently not in production.

    With that requirement overturned, the New Hampshire-based company was able to tweak the pistol and submit it for the state’s handgun roster, allowing residents to finally purchase something new.  

    Sig Sauer P320-M18 CA


    Overall Length
    Barrel Length
    Sight Radius
    Weight (with magazine)
    10 rounds


    Optics-Ready Slide
    SIGLITE Front Night Sight
    Removable Rear Night Sight Plate
    Ambidextrous Manual Safety

    The P320 M18 CA model sports the coyote tan finish associated with the M18 model but with a 10-round capacity magazine to appease California restrictions.

    This pistol also comes equipped with the P320 Fire Control Unit, which allows users to swap out grip modules, slides, and other upgrades.

    “The California P320-M18 is an exciting, long-waited, new release from SIG SAUER as it’s the very first opportunity for California enthusiasts to finally own a P320,” Tom Taylor, Chief Marketing Officer and Executive Vice President of Commercial Sales said in a press release.

    Sig M17
    Sig Sauer M17

    The P320-M18 itself is based on the pistol submitted to the U.S. Army’s Modular Handgun System competition – which Sig eventually won. After its adoption, the gun maker quickly released civilian versions known as the M17 and M18.

    While the M17 represented a full-size handgun, the M18 was designated as the carry option and has proven to be the more popular of the two.

    M9 (left) and M18 (right) on display. The M9 was phased out and replaced with the M18. (U.S. Air Force photo by Tech. Sgt. Michelle Y. Alvarez)

    Sig said it’s pleased to bring this option to more consumers.

    “Californians can now own the sidearm of the U.S. Military.  The P320-M18 CA shares the same features as the firearm that was awarded the U.S. Army contract for the Modular Handgun System (MHS) and is in service with the Army, Navy, Air Force, and Marines.”

    at GrabAGun

    Prices accurate at time of writing

    Prices accurate at time of writing

    Available Coupons

    The P320-M18 California-Compliant model retails for $779, but street prices seem to be hovering around $650.  

    What do you think of the California-compliant P320-M18? Let us know below. To get more of your Sig Sauer fix, check out our ultimate guide to P320 Models or shop for some upgrades.

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    7 Leave a Reply

    • Commenter Avatar

      So the only difference is the 10 rd magazine? Why the reference to “tweaks” then? Anyone know what the changes are?

      September 10, 2023 4:39 pm
      • Commenter Avatar

        They're changes to abide by California's required "safety features"; manual safety, loaded chamber indicator, and whatever else it was (I don't want to say with certainty since I don't remember all the requirements). Probably easy to get rid of most with a slide swap if you care for it.

        September 15, 2023 2:22 pm
        • Commenter Avatar

          Thank you! I was having trouble figuring out what the changes could be. Makes sense Sig would get the ms version “across the border”.

          September 15, 2023 3:10 pm
      • Commenter Avatar

        Loaded chamber indicator,anula safety and unloaded magazine trigger disconnect.

        September 24, 2023 7:55 pm
    • Commenter Avatar

      A win for Californian's that aren't in agreement with the majority in their cities and cannot move out of state.

      September 9, 2023 8:50 am
    • Commenter Avatar

      Sad state of affairs when we jump through the hoops regarding firearms. I would hope that our suppliers would fight arbitrary regulations, but at the first sign that the ATF is unpleased, they fold. California compliant forsooth!

      September 8, 2023 10:45 pm
      • Commenter Avatar

        It isn't just California: the NFA affects all 50 states and we haven't seen much challenge to it at all since it went into affect, other than pushing the limits on what doesn't fall into a Class 2 or 3 firearm (i.e. rifle styled "pistols", binary triggers, etc.).
        Everyone agrees these laws suck but no one wants to be the fronting the bill with fighting them.

        September 10, 2023 2:31 pm
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